Die holding means



April 18, 1933- T. M. LILLEBERG 1,903,786

DIE HOLDING MEANS Filed June 20. 1928 3 Sheets-Shee'cl 1 f /5 /4 l Z F5 zdewzan/Mlillebefy,

J v l dz MQ* M Pll 1 8, 1933. T. M. LILLEBERG 1,903,786

DIE- HOLDING MEANS Filed June .2o. 519,28 s sheets-sheet 's x Q *QQ 11pm Rw 1w@ A Illaw- @Wmzff `to holder structures Patented Aupr.` 18, 1.9.33

" UNITED STATES 'finzi/IAN nr'. Linnen-ERG., or' oHIcAGo. InLrNoIs,l Assrc'rNon. To THE NYE' 'Toon at MACHINE worms, or CHICAGO, ILLINoIs,Y A

CORPORATION ory ILLINOIS Y if nir.- HOLDING MEA-Ns 'Y Application filed June 20,

My invention relates, Vmore particularly, for threading diesA as for example dies to loe usedin threading pipes and the'like. i. n Y My primary object'isgto `provide for the holding ofa die formed infseparate lparts in a manner to permit of the conditioning of the i: Y therebyV and thereby separation,

holding means form the'die and their .ready following. the threading opera'- them from the threadscut permit `of Ythe ready withdrawal"or` the pipe romthe die, vor the die from th'e'pipe, as desired.

Referring `to theV accompanying'- .drawvdie sections Vto tion, to disengage Figure 1is a view in elevation o-'the upper `portion of a pipe-threading'machine embodying myinvention'. i

Figure 2 is an enlarged' view ofthedie and therefor VoffFigf. 1, 'the pipe being'shown in section, this view 'beingt'a'ken at the line 2-,2 on Fig. 1 and viewed inithe direction of the arrow and'showing the die and its holder in closed'thread-cutting con# dition. p

Figure ,3y is an end view' of the mechanism of Fig. 2 the mechanism being viewed from jthelrright hand side of Fig. 2.

Figure 4 is a view like 2and of the mechanism therein shown, showing the die and its holder in open position for releasing the pipe after'the threading operation.

Figure 5 is a section takenat the line 5 5 on Fig. 4 and viewed inthe direction of the arrow.

Figure 6 is an enlarged, broken,`sectional view taken at the line 6-6 on Fig'. 4 and viewed in the direction of the' arrows. Y

Figure 7 is a plan view'of the die-holding means and Figure 8, a section taken at the line8-8 on- Fig. 2' and viewed in the direction of the arrows.

f l have chosen to illustrate my inventionk as embodied in a pipe-threading machine shown in Fig. l1 and as to its general: features well Y known in the art, the machinecomprising af ramel9 *thel top 10 of'lwhich is provided with guide-ways (not shown) extending lengthwise thereof, one end of the frame bewith forwardly-projecting i928. serial No. 236.955.

e'oll'lipped withl a'tubular head*l 11, the

opening in which extends longitudinally of the Vmachine and receives'the pipert'obe threaded, such asthat'represented at `12. iThe headV 11, which is rotatably mounted inbear` Vings V13 on the frame 9 and is driven by any adjustment along the latter, is die and holder Vmechanism for threading the pipe'12 and constructed in accordance with my invention. r'Ihe" die to beused is formedo two similar sections 15 and 16, preteraloly provided by making the dieof'round form in one piece and then cutting it diametricallyY there` through, the sectionsV beingV preferably formed in this wayy as it ensures matching of vthe thvreadsrwhen the sections of the dieare locked togetherto form a rigiddie as hereinafter described. i Y A The `holder for the diefsections 15 vand 16 "comprises an upright 17.' at which the holder engages the guide-ways referred to,;thisupf right terminating at its upper end in a'baseportionl18 containing a recess 194 having per and lower guide-grooves'20 Vand 21 in which a slide 22 extendingcrosswise ofthe axis of: thehead' 11 is mounted. i

The slide 22 has pivotally connected therewith, at arstlud 23 thereon, a pair ofhollder levers 24; and 25,whichr extend crosswise of the axis of the pipe k12 to be threaded, andat oppositesides of said axis and above and below the' pipe, respectively, the pivotal Vconnections of these levers with lthe stud 23 being at ends oflthese levers andO to one sidev of said axis, as shown.

The holder-leers p as represented at 2,6 andj27, respectively/,to receivethe die sections 15 and 16, the marginal edges ot which areengaged by the lapping heads of screws 29` screwed into these levers, the levers 24 and 25v being Vprovided p p i i dowels 30 which slidingly extend into recesses 3 1, (=o`ne only of which is shown) inthese die-sections.

24 and"A 25 are'recessed Positioned on the slide 22, at the side of the pipe l2 opposite that adjacent to which the stud 23 extends, is a stud 32 shown as containino upwardly opening and downwardly openiig recesses 33 and 34, respectively, the studs 23 and 32 being preferably so positioned that a line connecting their centers would intersect the axis of the pipe l2 positioned in the machine for threading.

Extending into the recesses 33 and 34 are the lower and upper ends of coil springs 35 and 36, respectively, the upper end of spring 35 and the lower end of spring 36 extending into sockets 37 and 38, respectively, in the levers 24 and 25, these springs being under initial compression and exerting yielding force tending to swing said levers in opposite directions about the pivoting stud 23, other spring means comprising a spring 39, interposed between these levers between the pipe l2 and the pivoting stud 23, also serving to yieldingly swing these levers toward separated condition.

The levers 24 and 25 are provided with stop pins 40 and 4l, respectively, which extend into, and are movable up and down in, vertically elongated slots 42 and in a plate 44 secured to the stud 32 to extend adjacent the outer laces of the levers 24 and 25, this plate being held to the stud by a nut 45 screwed on the outer end of the stud. rllhe stop pin cooperating with the upper end of the slot 42 limits upward movement of the lever 24 and the pin 41 in cooperating with the lower end of the slot 43 limits downward movement of the lever 25.

Means are provided for controlling the positions occupied-by the levers 24 and 25, to cause these levers to extend into die-open position or die-closed position, at will, these means comprisinga lever 46 pivotally connected, as indicated at 47, with the lever 24 and having pivotal connection at 48 with the upper end of alink 49. The lower end of the link 49 is pivotally connected, at 50, with the upper end of a link 5l pivotally connected at 52 at its lower end to the outer end of the die-holding lever 25, the pivot 50 also being connected with the outer end of a link 53, the inner end of which is pivotally connected at 54, with the outer end of the dieholding lever 24. rlhe links 51 and 53 form in effect a toggle the movement of which into and out of extended position, is controlled by the lever 46 through the link 49.

The parts of the mechanism just described are such that when the actuating lever 46 is swung to the position shown in Fig. 2, the pivot 50 will be carried into a position in which it is substantially in line with a line drawn through the pivots 52 and 54, as shown, in which position the die-holding levers 24 and 25 are in die-closed position, the positioning of the actuating-lever mechanism as stated, effecting a locking of the levers 24 and 25 in the position stated, in which position the springs 35, 36 and 39 are in compressed condition.

The connection of the link 53 with the dieholder lever 24 is preferably an adjustable one produced, in the particular construction shown, by forming the outer end of the dieholding lever of a separate section 55 carrying the pivot 54 and adjustable crosswise of the body portion of the lever 24 in a direction toward and away from the lever 25. The section 55 is shown as provided with a pair of arms 56 and 57 at which it straddles the outer end ofthe body portion of the lever 24, the arm 57 carrying set screws 58 and 59 and the arm 56 a guide screw 60, for permitting adjustment of the section 55 up and down on the lever 24. The set screw 58 is journalled in the arm 57 and screws into a threaded opening 6l in the body portion of the lever 24, whereas the set screw 59 is threaded in an opening 62 in the arm 57 and bears against the upper surface of the body portion of the lever 24. The guide screw 6() is screwed into the opening 63 in the body of the lever 24 and at its outer, lower, end is slidable in an opening 56a in the arm 56, to thereby serve merely as a guide.

It will be understood from the foregoing that by constructing the die-holder in accordance with my invention it is not necessary in disengaging the pipe from the die, to rotate the pipe at its threads out of the die, but merely to throw the actuating lever 46 to the right in Fig. 2 whereupon the dieholdin'g levers 24 and 25 swing upwardly and downwardly, respectively, to the position shown in Fig. 4, which releases the pipe for removal'from its position within the conlines of the die, the various parts of the mechanism being so constructed and arranged as shown that the die-holding levers 24 and 25 move in opposite directions substantially the same distance, and that when the actuating lever 46 is operated in the reverse direction to the position shown in Fig. 2, the levers 24 and 25 will move into substantially predetermined position in which the die is closed for cutting the desired threads.

The arrangement of the springs 35 and 36 at the side of the pipe opposite that at which the levers 24 and 25 are pivotally connected by the stud 23 is desirable in order that the necessity for centralizing the die sections be reduced to the minimum.

The purpose of providing the adjustable sections 55 is to provide means whereby the die carrying portion of the lever 24 may be adjusted relative to the die-holder lever 25 to effect the production of oversize or undersize threads, if desired.

In the particular construction shown the holder members 24 and 25 and the stud 32 are so shaped and proportioned, as shown,

that'the space betweenv they members 24 and `25' at the stud 32,' inthe closed position ofthe device, isof less vertical height than the' vertical dimension, namely,the thickness offthe stud 32. Thus the memberstorming the die `holder are adapted forrocking movement as a unit-on the pivot Q3, which is very desirable as the= holder device -may thereby iioat so to `speak with the work'being threaded when the latter is not trulyconcentric withy theV axis about which thework rotatingjmeans rotate;

whiie i have iiiuetreeea ena described e particular embodiment 'of'l my invention, 1

do not wish tojbe understood as intending to limit it thereto, as the same may be variously modiiied and altered without deparaV ing from the spirit of' my invention.

" What I claim as new, and' desire to secure by LettersPatent is: j v

l; VA holdertor a sectional die comprising asu'pport, a pair of upper and lower die# section-holding leversk pivoted at-oneend to said support, an abutment on saidsupport adjacent the other end of said pair of leversgl and located between the latter, springsbearing against said abutment and said levers, respectively, and yieldingly'forcing said levers to die-open position, stop means for each of said levers limiting the. upward movement ofthe upper one of said levers and the downward movement otthe other of said levers, andv lever mechanism having an actuating element ulcrumed on one of said die-holding levers, operatively engaging the other of said die-holding levers and by which saidA dieholdinglevers mayv be, moved to die-closed position and be locked in such position;

2. A holderV for 'a sectional die comprising a pair of holder members for the respective die-sections pivotally connected together, a toggle comprising pivotally connected links,

said links being pivotally connected, respecv members extending in a position in which it tends, by gravity, to hold said membersfin cl-osed position. l A Y 4. A holder for a sectional die comprising a pair of holder members tor the respective die-sections pivotally connected together, a toggle comprising pivotally connected links, said links being pivotally connected, respectively, to said members, a pivotally'supported actuating lever, and a link pivotally connecting said lever with the pivotal connection bedie comprising tween said toggle links, said leverin the closed position of lsaid membersfextending in a position in which it tends, by gravity, to hold said'members in? closed position;l

5.` A holder for a sectional'die comprising a pair of holder membersffor the respective vdie-sections pivotally connected together,one of said members having a sectionadjustable vthereon in a crosswise direction towardand away'from the other of said members, and

locking means for holding said `members in closed position comprising cooperating parts operatively connectedtogether and with said section-and with the otherrot saidmembers,

respectively. A

" '6. A holder for a sectional die compfrisi'nga,

pair of holder members :tor the respectivev dieesections pivotallyv connected together, one

of said members having a section adjustable thereon in a crosswise` direction towardand away from Y the -other ofsaid; members,` and toggle mechanism comprising links pivotally p connected together Vand pivotally connected with -said section and the'other of said members, respectively. L 7 A holder fora sectional 'die comprising a pair ot pivoted holders forthe' respective sie die sections movable automatically to open position, toggle mechanism (operatively engaging said members lforactuating the latter to V closed position and comprising elements pivotally connected together and operatively engaging said members, means engaging said ing of-said members to a positionin whiclil the elements of saidV toggle `'mechanism assume dead center position.

y 8. A holder for a sectionaldie comprising a pair of pivoted holder members for therelspective dielse'ctions, spring mean's urging said members apart, toggle mechanismop ing the latter to closedposition and comprisingf elements pivotally connected together' and operatively engaging said 1nembersj,

lmeans engaging said togglemechanism at the joint between said elements andV by i which said toggle is operated, and stop' meanspreventing `the spreading 'of saidv membersto a position in which the elements ot said toggle mechanism assume deadl center position.'

y9. Aholder'for a sectional die comprising a vpairV of holder members tor the respective sections of the die andy pivoted on a common `toggle mechanism at thev joint between said elementsand by, which said toggle islopenl Vi-eo ated, and stop means preventingthe spreadn Aeratively engaging-said members for aetuat- VIl() fri-15 axis, said members being located above, and below, respectively, the work toY be threaded,

stop means eng'ageable bythe' upper one oi said members `for limiting thev downward movement of the latter,the space-between said members atsaid stop means when-'said members vare in die-closed Aposition `being j greater vertically than the vertical height of saidA stop means to permitsaid membersto swing as a unit on said common pivot, and means engaging said members for holding them in die-closed position.

l0. A holder :tor a sectional die comprising a pair of holder members for the respective sections of the die and pivoted on a common aXis, said members being located above and below, respectively, the work to be threaded, stop means engageable by the upper one of said members for limiting the downward movement of the latter, the space between said members at said stop means when said members are in die-closed position being greater vertically than the Vertical height of said stop means to permit said members to swing as a unit on said common pivot, and means engaging said members, respectively, and bodily movable therewith for moving said members to die-closed position.

1l. A holder for a sectional die comprising a pair of holder members for the respective die-sections pivotally connected together, one of said members having a section adjustable thereon in a crosswise direction toward and away from the other of said members, locking means for holding said members in closed position comprising cooperating parts operatively connected together and with said section and with the other of said members, respectively, and means for operating said cooperating parts into member closing position.

l2. A holder for a sectional die comprising a pair of holder members Jfor the respective die sections pivotally connected together, one of said members having a section adjustable thereon in a crosswise direction toward and away from the other of said members, toggle mechanism comprising links pivotally connected together and pivotally connected with said section and the other of said members, respectively, and means for actuating said toggle mechanism.

13. A holder for a sectional die comprising a pair of holder members for the respective sections of the die and pivoted on a common aXis, said members being located above, and below, respectively, the work to be threaded, means engageable by the upper one of said members for limiting the downward movement of the latter comprising a stationary stop member and a spring engaging said stop member and yieldingly resisting lowering of the upper one of said holder members, the space between said holder members at said stop means when said holder members are in die-closed position being greater vertically than the vertical height of said stop means to permit said holder members to swing as a unit on said common pivot, and means engaging said member for holding them in dieclosed position.

14. A holder for a sectional die comprising a pair of holder members for the respective sections of the die and pivoted on a common axis, said members being located above, and below, respectively, the work to be threaded, stop means located between said holder members and engageable by the upper one of said members for limiting the downward movement of the latter, the space between said members at said stop means when said members are die-closed being greater vertically than the vertical height of said stop means to permit said members to swing as a unit on said common pivot, and means engaging said members for holding them in die-closed position.

l5. A holder for a sectional die comprising a pair of holder members for the respective sections of the die and pivoted on a common axis, said members being located above, and below, respectively, the work to be threaded, a stationary stopl member located between said holder members, springs interposed between said stop member and said holder members, respectively, and yieldingly resisting movement of said holder members toward each other, the space between said holder members at said stop member when said holder members are in die-closed position being greater vertically than the vertical height of said stop member to permit said holder members to swing as a unit on said common pivot, and means engaging said holder members for holding them in disclosed position.

TIDEMAN M. LILLEBERG. 

